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Annals of Surgical Oncology

, Volume 22, Issue 8, pp 2532–2539 | Cite as

Early (<10 mm) HER2-Positive Invasive Breast Carcinomas are Associated with Extensive Diffuse High-Grade DCIS: Implications for Preoperative Mapping, Extent of Surgical Intervention, and Disease-Free Survival

  • Tibor Tot
Breast Oncology

Abstract

Background

The few publications on <10-mm invasive breast carcinomas have reported worse outcomes for women with human epidermal growth factor receptor 2 (HER2)-positive cancer compared with HER2-negative cases and indicated that the high risk of recurrence in HER2-positive cases is related to the high grade, hormone receptor negativity, and high proliferation index of the invasive tumor component.

Methods

We studied the subgross morphology of such tumors in a consecutive series of 203 cases documented in large-format histology slides and worked up with detailed radiological–pathological correlation.

Results

The invasive component was associated with a diffuse in situ component in 78 % of the HER2-positive and 26 % of HER2-negative tumors <10 mm in size (odds ratio [OR], 11.3936; P < .0001). The in situ component was of high grade in 75 % of HER2-positive and 9 % of HER2-negative cases (OR, 29.6000; P < .0001). Significant associations were also found between the HER2 positivity of the invasive component and diffuse combined lesion distribution (P > .0001), invasive tumor grade 3 (P = .0004), presence of vascular invasion (P = .0026), extensive disease (P = .0170), “not special” (ductal) histological tumor type (P = .0302), estrogen receptor negativity (OR, 7.8846; P < .0001), and high Ki67 proliferation index (OR, 5.0000; P = .0007). The HER2-positive tumors tended to be multifocal (OR, 2.000) and lymph node-positive (OR, 3.0147), but the tendency was not statistically significant.

Conclusions

The vast majority of <10-mm HER2-positive breast carcinomas exhibited a high-grade, diffuse, and extensive in situ component, which may explain the high risk of recurrence among these tumors.

Keywords

Invasive Breast Carcinoma Epithelial Growth Factor Receptor Invasive Component High Ki67 Proliferation Index Sick Lobe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgment

The author is thankful to his excellent colleagues: Drs. Nadja Lindhe, Mats Ingvarsson, and Prof. Laszlo Tabár, radiologists; Drs. Anders Cohen, Gunilla Christensson, and Maria Annerbo, breast surgeons; Drs. Maria Gere, Gyula Pekár, Syster Hofmeyer, breast pathologists; and all the other members of the Multidisciplinary Breast Team at Falun Central Hospital.

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Copyright information

© Society of Surgical Oncology 2015

Authors and Affiliations

  1. 1.Department of Pathology and Clinical CytologyCentral Hospital FalunFalunSweden

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